| time budget of tana river red colobus. | data on the activity pattern of a group of red colobus monkeys (colobus badius rufomitratus) living along the tana river, kenya, were collected during monthly 5-day observation periods between october 1973 and december 1974. the two most important activities were feeding and resting which occupy about one-third and one-half of daytime, respectively. these proportions vary considerably, however, according to age-sex class, time of day and month of year. compared to a group studied at a rain-fores ... | 1981 | 7194843 |
| gastrointestinal parasites of critically endangered primates endemic to tana river, kenya: tana river red colobus (procolobus rufomitratus) and crested mangabey (cercocebus galeritus). | we conducted fecal egg counts of gastrointestinal parasites of 2 critically endangered primates endemic to the forest of tana river, kenya. we aimed to use the fecal egg counts as proxies to quantify the prevalence of gastrointestinal parasites between the 2 primates. the tana river red colobus (procolobus rufomitratus) and crested mangabey (cercocebus galeritus) are of similar body size, but their behavioral ecology is very different. we predicted that mangabeys would have a higher prevalence o ... | 2006 | 17152930 |
| host density and human activities mediate increased parasite prevalence and richness in primates threatened by habitat loss and fragmentation. | 1. habitat loss and fragmentation are the principal causes of the loss of biological diversity. in addition, parasitic diseases are an emerging threat to many animals. nevertheless, relatively few studies have tested how habitat loss and fragmentation influence the prevalence and richness of parasites in animals. 2. several studies of nonhuman primates have shown that measures of human activity and forest fragmentation correlate with parasitism in primates. however, these studies have not tested ... | 2009 | 19120603 |
| coinfection of ugandan red colobus (procolobus [piliocolobus] rufomitratus tephrosceles) with novel, divergent delta-, lenti-, and spumaretroviruses. | nonhuman primates host a plethora of potentially zoonotic microbes, with simian retroviruses receiving heightened attention due to their roles in the origins of human immunodeficiency viruses type 1 (hiv-1) and hiv-2. however, incomplete taxonomic and geographic sampling of potential hosts, especially the african colobines, has left the full range of primate retrovirus diversity unexplored. blood samples collected from 31 wild-living red colobus monkeys (procolobus [piliocolobus] rufomitratus te ... | 2009 | 19692478 |
| beyond bushmeat: animal contact, injury, and zoonotic disease risk in western uganda. | zoonotic pathogens cause an estimated 70% of emerging and re-emerging infectious diseases in humans. in sub-saharan africa, bushmeat hunting and butchering is considered the primary risk factor for human-wildlife contact and zoonotic disease transmission, particularly for the transmission of simian retroviruses. however, hunting is only one of many activities in sub-saharan africa that bring people and wildlife into contact. here, we examine human-animal interaction in western uganda, identifyin ... | 2014 | 24845574 |
| divergent simian arteriviruses cause simian hemorrhagic fever of differing severities in macaques. | simian hemorrhagic fever (shf) is a highly lethal disease in captive macaques. three distinct arteriviruses are known etiological agents of past shf epizootics, but only one, simian hemorrhagic fever virus (shfv), has been isolated in cell culture. the natural reservoir(s) of the three viruses have yet to be identified, but african nonhuman primates are suspected. eleven additional divergent simian arteriviruses have been detected recently in diverse and apparently healthy african cercopithecid ... | 2016 | 26908578 |
| primate vaginal microbiomes exhibit species specificity without universal lactobacillus dominance. | bacterial communities colonizing the reproductive tracts of primates (including humans) impact the health, survival and fitness of the host, and thereby the evolution of the host species. despite their importance, we currently have a poor understanding of primate microbiomes. the composition and structure of microbial communities vary considerably depending on the host and environmental factors. we conducted comparative analyses of the primate vaginal microbiome using pyrosequencing of the 16s r ... | 2014 | 25036926 |
| redtail and red colobus monkeys show intersite urinary cortisol concentration variation in kibale national park, uganda. | non-invasive measurement of urinary cortisol is a proven method of evaluating the impact of environmental stressors on wild primates. variation in cortisol concentrations can reflect physiological stress, and prolonged elevation of circulating cortisol can significantly affect individual and population-level health. in a previous study, we found that urinary cortisol concentrations in grey-cheeked mangabeys (lophocebus albigena) were higher at a highly disturbed site (mainaro) in kibale national ... | 2015 | 27293691 |
| extra-group sexual consortship in the tana river red colobus (procolobus rufomitratus) ? | | 2006 | 12399660 |
| female transference and mate choice among tana river red colobus. | red colobus are one of a small number of primate species in which females have been reported to transfer between breeding groups more commonly than males. several authors have hypothesised that in such species transference may serve to reduce the risk to females of producing offspring of lower fitness through inbreeding. the hypothesis offers no explanation of why females rather than males are responsible for outbreeding in these species, but remains plausible so long as male membership of breed ... | 1979 | 114860 |
| tana river red colobus and crested mangabey: results of recent censuses. | censuses of the tana river red colobus (colobus badius rufomitratus) and crested mangabey (cercocebus galeritus galeritus), primate species endemic to riverine forests of the lower tana river in eastern kenya, showed significant population declines for both species between the mid-1970s and 1980s. red colobus declined in terms of group size and number of groups per forest; the mangabey population declined only in numbers of groups per forest. there was no significant change in mean group age/sex ... | 1992 | 31948170 |
| longitudinal changes in the targets of chimpanzee (pan troglodytes) hunts at mahale mountains national park: how and why did they begin to intensively hunt red colobus (piliocolobus rufomitratus) in the 1980s? | the hunting activities of chimpanzees (pan troglodytes) at mahale mountains national park exhibited a significant change over a 46-year observation period, shifting from sporadic hunting for small ungulates and primates through seizure or chasing, to a specialized hunting habit for red colobus (piliocolobus rufomitratus). by the early 1980s, a new hunting habit had developed through the following stages: (1) occasional single kills by mature/adolescent males, (2) multiple kills by mature/adolesc ... | 2020 | 32095911 |